Improvement in calipers



w. A. MORSE.

Calipers.

Patented Jan. ,26, 1864.

UNITED STATES PATENT OFFICE.

WVILLIAM A. MORSE, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN CAL |PERS.

Specification forming part of Letters Patent No. 4 I ,387, dated January 2b, 186-1.

To all whom it may concern.-

Be it known that I, \VILLIAM A. MoRsE, of the city of Boston, in the county of Suffolk and State of Massachusetts, have invented a new and useful Improvement in Self-Regulating Calipers; and I do hereby declare that the following is a full and exact description of the construction and operation of the same, refer ence being had to the annex d drawings, making a part of this specification, in which- Figure 1 is a perspective view, and Fig. 2a sectional View.

I make my self-regulating calipers of two pieces, B B, each in form of the letter S, and connected in the center by a thumb-screw, D. The points or arms F F shut by each other,

and upon one side of each is a scale, A, of inches and parts of an inch, which registers the opening distance between the points or legs N N, and may be read instantly from either side without having recourse to a rule.

'VVhat'I claim as my invention, and desire to secure by Letters Patent, is

The projecting ends or arms F F, passing each other as specified, in combination with the double scale'A A, for the purpose herein shown and described.

VILLIAM A. ,MORSE.

In presence of- O. W. HUNTINGTON, R. M. MORSE, Jr. 

